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For the manufacture of Portland cement, the proportions of raw materials used, are. | |
A. | lime 63% ; silica 22% ; other ingredients 15% [Correct Answer] |
B. | lime 22% ; silica 63% ; other ingredients 15% [Wrong Answer] |
C. | silica 40% ; lime 40% ; other ingredients 20% [Wrong Answer] |
D. | silica 70% ; lime 20% ; other ingredients 10%. [Wrong Answer] |